Thread: Encryption Maniac

OK Vasanth,

Start Here

As you'll see, DES is still considered for all practical purposes uncrackable, especially in triple-des form.

The most secure encription is quantum encription, not only is it impossible to break, but it is also impossible to intercept a message without the reciever and sender knowing. I would explain but I woudnt do a very good job, just search for it on google or something...


Gr3g

PS-- Remember with most codes you have to use a key to decrypt. How will you transfer a key securely? For a cyper to be good it cannot depend only on the algorithm (especaily for a distributed program), but should depend on a secure passcode/word. Think of this Anne wants to send a message to Bob so she stcks her message in a metal box locks the box and mails it to Bob. Bob installs his own lock on the box. Then mails the box back to Anne. Anne removes her lock and mails the box back to Bob. Bob removes his lock and reads the message.

My very first ever post on this board has the start of my DES C++ implementation attached

Bad news is, I haven't got much further

Oh well

Don't you guys own PGP? lol

Gr3g brought up the interesting problem, but all that has been solved by Public Key encryption.

Let me run the basics of Public-Key for everybody. A person has two "keys". One is public, that you hand out to everbody, and one is private that you keep to yourself and rarely ever see. The public key is to encrypt data and the private key is to decrypt data. So let me run over Gr3g's scenario with public key:

Anne wants to send a message to Bob so she types her message and encrypts it with Bob's public key. Bob receives the encrypted message and decrypts it with his private key. Bob types up a new message and encrypts it with Anne's public key and sends it out. Anne gets the message and decrypts it with her private key.

Public keys and private keys are related but asymmetric. It is (almost) impossible to find out one key from the other.

// Well how do i get the hex values pf letters in c++ first..
Look up in the standard <iomanip> lib for the hex stream manipulator. I have never really used it much. I know you can send hex values of variables to ostream's but I'm not sure if you can actually attain the hex values into variables.

Good luck with the encrypting.

PS: I wrote an XOR^ encryption program (one time pad) and what I did was let the user enter a password that was however long. If the password wasn't long enough, I would just create a new string with the password repeating over and over again. If the password was too long, I just used as much as I needed. It was interesting and it worked.

Originally posted by vasanth
Ok thanx.. But my program does not have an explanation on how to use this header.. can u help.

Uhh, the file iomanip.h may be on your computer somewhere...

Quantum encription is here today it is the best and it will always be unbreakable.

Greg

ps Did you know that Russian one time pads were broken by american code breakers because the russians would print multiple copys of some of the pads.

Have you read about quantum encription? It really is impossible to break.

Gr3g